Coffee machine



FIG. 1 illustrates a front perspective view of the coffee machine showing my new design in a second embodiment, wherein the broken line showings of the bottle are for illustrative purposes only and form no part of the claimed design;

FIG. 2 illustrates a front elevation view thereof;

FIG. 3 illustrates a rear elevation view thereof;

FIG. 4 illustrates a left side elevation view thereof;

FIG. 5 illustrates a right side elevation view thereof;

FIG. 6 illustrates a top view thereof; and,

FIG. 7 illustrates a bottom view thereof. 

CLAIM The ornamental design for a coffee machine, as shown and described. 